The solver is able to solve all the Weekly Extreme puzzles (and the user generated puzzles from the feeds) in around 3m on my machine.

The solver runs through a list of rules searching for a hit that allows it to make progress. Changing the order of the rules would change the distribution of rules used whilst solving. The default rules order solves all the puzzles with the following results, where:

Ord - is the order the rule is run in.Hit % and # - is a count of times the rule was successful.Digits % and # - is a count of the digits the rule was able to eliminate.